*{
    margin: 0;
    padding: 0;
}

/* 头像样式 */
.avatar-container {
    height: 3rem;
    width: 3rem;
    display: inline-flex;       /* 使用flex布局 */
    align-items: center;        /* 垂直居中 */
    justify-content: center;    /* 水平居中 */
    background-color: #007BFF;
    color: white;
    text-align: center;
    border-radius: 1.5rem;      /* 更简单的方式来调整边界半径 */
}

/* 头像内容样式 */
.avatar-content {
    font-size: 1.5rem;
    display: block;
}


/* 粘性导航栏样式 */
.navbar {
    list-style-type: none;
    overflow: hidden;
    background-color: #E9B384;
    position: sticky;
    top: 0;
    height: 100px;
}

.navbar li {
    float: right;
    height: 100px;
}

.navbar li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    height: 100px;
    width: 100px;
    line-height: 80px;
    font-size: 25px;
}

.navbar li a:hover {
    background-color: #9BABB8;
}

/* 页面布局样式 */
body {
    margin: 0;
    font-family: Arial, sans-serif;
}

#up0 {
    background-image: url(../img/dive-4219524_1280.png);
    background-size: cover;
    padding: 20px;
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;

}

#up0 img {
    width: 100%;
    height: 100%;
    position: relative;
    left: 20px;

}



.search-box {
    float: right;
    position: relative;
    right: 15%;
}

.search-box input[type="text"] {
    border-radius: 20px;
    padding: 8px 30px 8px 15px;
    border: 1px solid #ccc;
    transition: border-color 0.3s ease;
}

.search-box input[type="text"]:focus {
    border-color: dodgerblue;
}

.search-box button {
    position: absolute;
    top: 50%;
    right: 5px;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    transition: color 0.3s ease;
}

.search-box input:hover{
    border: 2px solid dodgerblue;
    box-shadow: 1px 1px 10px #888888;
}

.search-box button:hover {
    color: dodgerblue;
    size: ledger;
}

.login {
    position: relative;
    left: 90%;
}

.login a {
    margin-left: 10px;
    text-decoration: none;
    color: white;
}

.login a:hover{
    color: dodgerblue;

}

.login::after {
    display: table;
    clear: both;
}

#up1 {
    position: sticky;
    top: 0;
    z-index: 1;
}

#mid {
    height: 1500px;
    background-image:url(../img/fish-5310727_1280.png);
    background-size:100% 100%;
    justify-content: center; /* 水平居中 */
    position: relative; /* 添加相对定位 */
}

#mid a{
    color: #000000;
    text-decoration: none;
}

.sticky-block {
    position: sticky;
    top: 180px;
    width: 300px;
    height: 300px;
    background: rgba(255,250,205,0.6);
    overflow: hidden;
    border-radius: 60px;
}

.sticky-block img {
    height: 300px;
    width: 300px;
    box-shadow: 2px 2px 50px #888888;
    border-radius: 60px;

}

.image-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.3s ease-in, transform 0.5s ease-in;


}


.image-item {
    display: flex;
    align-items: center;
    margin-bottom: 50px;
    width: 800px;
    height: 180px;
    box-shadow: 2px 2px 50px #888888;
    border-radius: 50px;
    background: rgba(255,255,255,0.8);
}

.img-box{
    width: 250px;
    height: 160px;
    overflow: hidden;
    position: relative;
    left: 40px;

}

.image-item img {
    width: 100%;
    height: 100%;
    margin-right: 20px;
    transition: transform 0.6s ease-in-out;
}

.image-item img:hover {
    transform: scale(1.1);
}

.image-caption {
    text-align: center;
    position: relative;
    margin-left: 80px;
}

.image-caption h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

.image-caption p {
    font-size: 16px;
    color: gray;
}

.show {
    opacity: 1;
    transform: translateY(0);
}

#down {
    height: 200px;
    background-color: #f1f1f1;
    text-align: center;
    padding-top: 80px;
    background-image: linear-gradient(180deg,#FFFACD, #FFFACD);
}

.introduction{
    width: 60%;
    height: 120px;
    letter-spacing: 2px;
    padding: 10px;
    text-align: center;
    position: relative;
    left: 20%;
    top: -20%;
    line-height: 200%;
}


.footer{
    width: 100%;
    position: relative;
    bottom: -10px;
    height: 100px;
    background: #7C9D96;
    display: flex;
    justify-content: space-around;
    align-items: center;
    overflow: hidden;
}


